var Prototype={Version:"1.5.0",BrowserFeatures:{XPath:!!document.evaluate},ScriptFragment:"(?:<script.*?>)((\n|\r|.)*?)(?:<\/script>)",emptyFunction:function(){},K:function(x){return x;}};var Class={create:function(){return function(){this.initialize.apply(this,arguments);};}};var Abstract=new Object();Object.extend=function(destination,source){for(var property in source){destination[property]=source[property];}return destination;};Object.extend(Object,{inspect:function(object){try{if(object===undefined){return"undefined";}if(object===null){return"null";}return object.inspect?object.inspect():object.toString();}catch(e){if(e instanceof RangeError){return"...";}throw e;}},keys:function(object){var keys=[];for(var property in object){keys.push(property);}return keys;},values:function(object){var values=[];for(var property in object){values.push(object[property]);}return values;},clone:function(object){return Object.extend({},object);}});Function.prototype.bind=function(){var __method=this,args=$A(arguments),object=args.shift();return function(){return __method.apply(object,args.concat($A(arguments)));};};Function.prototype.bindAsEventListener=function(object){var __method=this,args=$A(arguments),object=args.shift();return function(event){return __method.apply(object,[(event||window.event)].concat(args).concat($A(arguments)));};};Object.extend(Number.prototype,{toColorPart:function(){var digits=this.toString(16);if(this<16){return"0"+digits;}return digits;},succ:function(){return this+1;},times:function(iterator){$R(0,this,true).each(iterator);return this;}});var Try={these:function(){var returnValue;for(var i=0,length=arguments.length;i<length;i++){var lambda=arguments[i];try{returnValue=lambda();break;}catch(e){}}return returnValue;}};var PeriodicalExecuter=Class.create();PeriodicalExecuter.prototype={initialize:function(callback,frequency){this.callback=callback;this.frequency=frequency;this.currentlyExecuting=false;this.registerCallback();},registerCallback:function(){this.timer=setInterval(this.onTimerEvent.bind(this),this.frequency*1000);},stop:function(){if(!this.timer){return;}clearInterval(this.timer);this.timer=null;},onTimerEvent:function(){if(!this.currentlyExecuting){try{this.currentlyExecuting=true;this.callback(this);}finally{this.currentlyExecuting=false;}}}};String.interpret=function(value){return value==null?"":String(value);};Object.extend(String.prototype,{gsub:function(pattern,replacement){var result="",source=this,match;replacement=arguments.callee.prepareReplacement(replacement);while(source.length>0){if(match=source.match(pattern)){result+=source.slice(0,match.index);result+=String.interpret(replacement(match));source=source.slice(match.index+match[0].length);}else{result+=source,source="";}}return 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trues=[],falses=[];this.each(function(value,index){((iterator||Prototype.K)(value,index)?trues:falses).push(value);});return[trues,falses];},pluck:function(property){var results=[];this.each(function(value,index){results.push(value[property]);});return results;},reject:function(iterator){var results=[];this.each(function(value,index){if(!iterator(value,index)){results.push(value);}});return results;},sortBy:function(iterator){return this.map(function(value,index){return{value:value,criteria:iterator(value,index)};}).sort(function(left,right){var a=left.criteria,b=right.criteria;return a<b?-1:a>b?1:0;}).pluck("value");},toArray:function(){return this.map();},zip:function(){var iterator=Prototype.K,args=$A(arguments);if(typeof args.last()=="function"){iterator=args.pop();}var collections=[this].concat(args).map($A);return this.map(function(value,index){return iterator(collections.pluck(index));});},size:function(){return 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value=this[key];if(value&&value==Hash.prototype[key]){continue;}var pair=[key,value];pair.key=key;pair.value=value;iterator(pair);}},keys:function(){return this.pluck("key");},values:function(){return this.pluck("value");},merge:function(hash){return $H(hash).inject(this,function(mergedHash,pair){mergedHash[pair.key]=pair.value;return mergedHash;});},remove:function(){var result;for(var i=0,length=arguments.length;i<length;i++){var value=this[arguments[i]];if(value!==undefined){if(result===undefined){result=value;}else{if(result.constructor!=Array){result=[result];}result.push(value);}}delete this[arguments[i]];}return result;},toQueryString:function(){return Hash.toQueryString(this);},inspect:function(){return"#<Hash:{"+this.map(function(pair){return pair.map(Object.inspect).join(": ");}).join(", ")+"}>";}});function $H(object){if(object&&object.constructor==Hash){return object;}return new Hash(object);}ObjectRange=Class.create();Object.extend(ObjectRange.prototype,Enumerable);Object.extend(ObjectRange.prototype,{initialize:function(start,end,exclusive){this.start=start;this.end=end;this.exclusive=exclusive;},_each:function(iterator){var value=this.start;while(this.include(value)){iterator(value);value=value.succ();}},include:function(value){if(value<this.start){return false;}if(this.exclusive){return value<this.end;}return value<=this.end;}});var $R=function(start,end,exclusive){return new ObjectRange(start,end,exclusive);};var Ajax={getTransport:function(){return Try.these(function(){return new XMLHttpRequest();},function(){return new ActiveXObject("Msxml2.XMLHTTP");},function(){return new 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range=element.ownerDocument.createRange();range.selectNodeContents(element);element.parentNode.replaceChild(range.createContextualFragment(html.stripScripts()),element);}setTimeout(function(){html.evalScripts();},10);return element;},inspect:function(element){element=$(element);var result="<"+element.tagName.toLowerCase();$H({id:"id",className:"class"}).each(function(pair){var property=pair.first(),attribute=pair.last();var value=(element[property]||"").toString();if(value){result+=" "+attribute+"="+value.inspect(true);}});return result+">";},recursivelyCollect:function(element,property){element=$(element);var elements=[];while(element=element[property]){if(element.nodeType==1){elements.push(Element.extend(element));}}return elements;},ancestors:function(element){return $(element).recursivelyCollect("parentNode");},descendants:function(element){return 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Selector.findElement($(element).previousSiblings(),expression,index);},next:function(element,expression,index){return Selector.findElement($(element).nextSiblings(),expression,index);},getElementsBySelector:function(){var args=$A(arguments),element=$(args.shift());return Selector.findChildElements(element,args);},getElementsByClassName:function(element,className){return document.getElementsByClassName(className,element);},readAttribute:function(element,name){element=$(element);if(document.all&&!window.opera){var t=Element._attributeTranslations;if(t.values[name]){return t.values[name](element,name);}if(t.names[name]){name=t.names[name];}var attribute=element.attributes[name];if(attribute){return attribute.nodeValue;}}return element.getAttribute(name);},getHeight:function(element){return $(element).getDimensions().height;},getWidth:function(element){return $(element).getDimensions().width;},classNames:function(element){return new Element.ClassNames(element);},hasClassName:function(element,className){if(!(element=$(element))){return;}var elementClassName=element.className;if(elementClassName.length==0){return false;}if(elementClassName==className||elementClassName.match(new RegExp("(^|\\s)"+className+"(\\s|$)"))){return true;}return false;},addClassName:function(element,className){if(!(element=$(element))){return;}Element.classNames(element).add(className);return element;},removeClassName:function(element,className){if(!(element=$(element))){return;}Element.classNames(element).remove(className);return element;},toggleClassName:function(element,className){if(!(element=$(element))){return;}Element.classNames(element)[element.hasClassName(className)?"remove":"add"](className);return element;},observe:function(){Event.observe.apply(Event,arguments);return $A(arguments).first();},stopObserving:function(){Event.stopObserving.apply(Event,arguments);return $A(arguments).first();},cleanWhitespace:function(element){element=$(element);var node=element.firstChild;while(node){var nextNode=node.nextSibling;if(node.nodeType==3&&!/\S/.test(node.nodeValue)){element.removeChild(node);}node=nextNode;}return element;},empty:function(element){return $(element).innerHTML.match(/^\s*$/);},descendantOf:function(element,ancestor){element=$(element),ancestor=$(ancestor);while(element=element.parentNode){if(element==ancestor){return true;}}return false;},scrollTo:function(element){element=$(element);var pos=Position.cumulativeOffset(element);window.scrollTo(pos[0],pos[1]);return element;},getStyle:function(element,style){element=$(element);if(["float","cssFloat"].include(style)){style=(typeof element.style.styleFloat!="undefined"?"styleFloat":"cssFloat");}style=style.camelize();var value=element.style[style];if(!value){if(document.defaultView&&document.defaultView.getComputedStyle){var css=document.defaultView.getComputedStyle(element,null);value=css?css[style]:null;}else{if(element.currentStyle){value=element.currentStyle[style];}}}if((value=="auto")&&["width","height"].include(style)&&(element.getStyle("display")!="none")){value=element["offset"+style.capitalize()]+"px";}if(window.opera&&["left","top","right","bottom"].include(style)){if(Element.getStyle(element,"position")=="static"){value="auto";}}if(style=="opacity"){if(value){return parseFloat(value);}if(value=(element.getStyle("filter")||"").match(/alpha\(opacity=(.*)\)/)){if(value[1]){return parseFloat(value[1])/100;}}return 1;}return value=="auto"?null:value;},setStyle:function(element,style){element=$(element);for(var name in style){var value=style[name];if(name=="opacity"){if(value==1){value=(/Gecko/.test(navigator.userAgent)&&!/Konqueror|Safari|KHTML/.test(navigator.userAgent))?0.999999:1;if(/MSIE/.test(navigator.userAgent)&&!window.opera){element.style.filter=element.getStyle("filter").replace(/alpha\([^\)]*\)/gi,"");}}else{if(value==""){if(/MSIE/.test(navigator.userAgent)&&!window.opera){element.style.filter=element.getStyle("filter").replace(/alpha\([^\)]*\)/gi,"");}}else{if(value<0.00001){value=0;}if(/MSIE/.test(navigator.userAgent)&&!window.opera){element.style.filter=element.getStyle("filter").replace(/alpha\([^\)]*\)/gi,"")+"alpha(opacity="+value*100+")";}}}}else{if(["float","cssFloat"].include(name)){name=(typeof element.style.styleFloat!="undefined")?"styleFloat":"cssFloat";}}element.style[name.camelize()]=value;}return element;},getDimensions:function(element){element=$(element);var display=$(element).getStyle("display");if(display!="none"&&display!=null){return{width:element.offsetWidth,height:element.offsetHeight};}var els=element.style;var originalVisibility=els.visibility;var originalPosition=els.position;var originalDisplay=els.display;els.visibility="hidden";els.position="absolute";els.display="block";var originalWidth=element.clientWidth;var originalHeight=element.clientHeight;els.display=originalDisplay;els.position=originalPosition;els.visibility=originalVisibility;return{width:originalWidth,height:originalHeight};},makePositioned:function(element){element=$(element);var pos=Element.getStyle(element,"position");if(pos=="static"||!pos){element._madePositioned=true;element.style.position="relative";if(window.opera){element.style.top=0;element.style.left=0;}}return element;},undoPositioned:function(element){element=$(element);if(element._madePositioned){element._madePositioned=undefined;element.style.position=element.style.top=element.style.left=element.style.bottom=element.style.right="";}return element;},makeClipping:function(element){element=$(element);if(element._overflow){return element;}element._overflow=element.style.overflow||"auto";if((Element.getStyle(element,"overflow")||"visible")!="hidden"){element.style.overflow="hidden";}return element;},undoClipping:function(element){element=$(element);if(!element._overflow){return element;}element.style.overflow=element._overflow=="auto"?"":element._overflow;element._overflow=null;return element;}};Object.extend(Element.Methods,{childOf:Element.Methods.descendantOf});Element._attributeTranslations={};Element._attributeTranslations.names={colspan:"colSpan",rowspan:"rowSpan",valign:"vAlign",datetime:"dateTime",accesskey:"accessKey",tabindex:"tabIndex",enctype:"encType",maxlength:"maxLength",readonly:"readOnly",longdesc:"longDesc"};Element._attributeTranslations.values={_getAttr:function(element,attribute){return element.getAttribute(attribute,2);},_flag:function(element,attribute){return $(element).hasAttribute(attribute)?attribute:null;},style:function(element){return element.style.cssText.toLowerCase();},title:function(element){var node=element.getAttributeNode("title");return node.specified?node.nodeValue:null;}};Object.extend(Element._attributeTranslations.values,{href:Element._attributeTranslations.values._getAttr,src:Element._attributeTranslations.values._getAttr,disabled:Element._attributeTranslations.values._flag,checked:Element._attributeTranslations.values._flag,readonly:Element._attributeTranslations.values._flag,multiple:Element._attributeTranslations.values._flag});Element.Methods.Simulated={hasAttribute:function(element,attribute){var t=Element._attributeTranslations;attribute=t.names[attribute]||attribute;return $(element).getAttributeNode(attribute).specified;}};if(document.all&&!window.opera){Element.Methods.update=function(element,html){element=$(element);html=typeof html=="undefined"?"":html.toString();var tagName=element.tagName.toUpperCase();if(["THEAD","TBODY","TR","TD"].include(tagName)){var div=document.createElement("div");switch(tagName){case"THEAD":case"TBODY":div.innerHTML="<table><tbody>"+html.stripScripts()+"</tbody></table>";depth=2;break;case"TR":div.innerHTML="<table><tbody><tr>"+html.stripScripts()+"</tr></tbody></table>";depth=3;break;case"TD":div.innerHTML="<table><tbody><tr><td>"+html.stripScripts()+"</td></tr></tbody></table>";depth=4;}$A(element.childNodes).each(function(node){element.removeChild(node);});depth.times(function(){div=div.firstChild;});$A(div.childNodes).each(function(node){element.appendChild(node);});}else{element.innerHTML=html.stripScripts();}setTimeout(function(){html.evalScripts();},10);return element;};}Object.extend(Element,Element.Methods);var _nativeExtensions=false;if(/Konqueror|Safari|KHTML/.test(navigator.userAgent)){["","Form","Input","TextArea","Select"].each(function(tag){var className="HTML"+tag+"Element";if(window[className]){return;}var klass=window[className]={};klass.prototype=document.createElement(tag?tag.toLowerCase():"div").__proto__;});}Element.addMethods=function(methods){Object.extend(Element.Methods,methods||{});function copy(methods,destination,onlyIfAbsent){onlyIfAbsent=onlyIfAbsent||false;var cache=Element.extend.cache;for(var property in methods){var value=methods[property];if(!onlyIfAbsent||!(property in destination)){destination[property]=cache.findOrStore(value);}}}if(typeof HTMLElement!="undefined"){copy(Element.Methods,HTMLElement.prototype);copy(Element.Methods.Simulated,HTMLElement.prototype,true);copy(Form.Methods,HTMLFormElement.prototype);[HTMLInputElement,HTMLTextAreaElement,HTMLSelectElement].each(function(klass){copy(Form.Element.Methods,klass.prototype);});_nativeExtensions=true;}};var Toggle=new Object();Toggle.display=Element.toggle;Abstract.Insertion=function(adjacency){this.adjacency=adjacency;};Abstract.Insertion.prototype={initialize:function(element,content){this.element=$(element);this.content=content.stripScripts();if(this.adjacency&&this.element.insertAdjacentHTML){try{this.element.insertAdjacentHTML(this.adjacency,this.content);}catch(e){var tagName=this.element.tagName.toUpperCase();if(["TBODY","TR"].include(tagName)){this.insertContent(this.contentFromAnonymousTable());}else{throw e;}}}else{this.range=this.element.ownerDocument.createRange();if(this.initializeRange){this.initializeRange();}this.insertContent([this.range.createContextualFragment(this.content)]);}setTimeout(function(){content.evalScripts();},10);},contentFromAnonymousTable:function(){var div=document.createElement("div");div.innerHTML="<table><tbody>"+this.content+"</tbody></table>";return $A(div.childNodes[0].childNodes[0].childNodes);}};var Insertion=new Object();Insertion.Before=Class.create();Insertion.Before.prototype=Object.extend(new Abstract.Insertion("beforeBegin"),{initializeRange:function(){this.range.setStartBefore(this.element);},insertContent:function(fragments){fragments.each((function(fragment){this.element.parentNode.insertBefore(fragment,this.element);}).bind(this));}});Insertion.Top=Class.create();Insertion.Top.prototype=Object.extend(new Abstract.Insertion("afterBegin"),{initializeRange:function(){this.range.selectNodeContents(this.element);this.range.collapse(true);},insertContent:function(fragments){fragments.reverse(false).each((function(fragment){this.element.insertBefore(fragment,this.element.firstChild);}).bind(this));}});Insertion.Bottom=Class.create();Insertion.Bottom.prototype=Object.extend(new Abstract.Insertion("beforeEnd"),{initializeRange:function(){this.range.selectNodeContents(this.element);this.range.collapse(this.element);},insertContent:function(fragments){fragments.each((function(fragment){this.element.appendChild(fragment);}).bind(this));}});Insertion.After=Class.create();Insertion.After.prototype=Object.extend(new Abstract.Insertion("afterEnd"),{initializeRange:function(){this.range.setStartAfter(this.element);},insertContent:function(fragments){fragments.each((function(fragment){this.element.parentNode.insertBefore(fragment,this.element.nextSibling);}).bind(this));}});Element.ClassNames=Class.create();Element.ClassNames.prototype={initialize:function(element){this.element=$(element);},_each:function(iterator){this.element.className.split(/\s+/).select(function(name){return name.length>0;})._each(iterator);},set:function(className){this.element.className=className;},add:function(classNameToAdd){if(this.include(classNameToAdd)){return;}this.set($A(this).concat(classNameToAdd).join(" "));},remove:function(classNameToRemove){if(!this.include(classNameToRemove)){return;}this.set($A(this).without(classNameToRemove).join(" "));},toString:function(){return $A(this).join(" ");}};Object.extend(Element.ClassNames.prototype,Enumerable);var Selector=Class.create();Selector.prototype={initialize:function(expression){this.params={classNames:[]};this.expression=expression.toString().strip();this.parseExpression();this.compileMatcher();},parseExpression:function(){function abort(message){throw"Parse error in selector: "+message;}if(this.expression==""){abort("empty expression");}var params=this.params,expr=this.expression,match,modifier,clause,rest;while(match=expr.match(/^(.*)\[([a-z0-9_:-]+?)(?:([~\|!]?=)(?:"([^"]*)"|([^\]\s]*)))?\]$/i)){params.attributes=params.attributes||[];params.attributes.push({name:match[2],operator:match[3],value:match[4]||match[5]||""});expr=match[1];}if(expr=="*"){return this.params.wildcard=true;}while(match=expr.match(/^([^a-z0-9_-])?([a-z0-9_-]+)(.*)/i)){modifier=match[1],clause=match[2],rest=match[3];switch(modifier){case"#":params.id=clause;break;case".":params.classNames.push(clause);break;case"":case undefined:params.tagName=clause.toUpperCase();break;default:abort(expr.inspect());}expr=rest;}if(expr.length>0){abort(expr.inspect());}},buildMatchExpression:function(){var params=this.params,conditions=[],clause;if(params.wildcard){conditions.push("true");}if(clause=params.id){conditions.push('element.readAttribute("id") == '+clause.inspect());}if(clause=params.tagName){conditions.push("element.tagName.toUpperCase() == "+clause.inspect());}if((clause=params.classNames).length>0){for(var i=0,length=clause.length;i<length;i++){conditions.push("element.hasClassName("+clause[i].inspect()+")");}}if(clause=params.attributes){clause.each(function(attribute){var value="element.readAttribute("+attribute.name.inspect()+")";var splitValueBy=function(delimiter){return value+" && "+value+".split("+delimiter.inspect()+")";};switch(attribute.operator){case"=":conditions.push(value+" == "+attribute.value.inspect());break;case"~=":conditions.push(splitValueBy(" ")+".include("+attribute.value.inspect()+")");break;case"|=":conditions.push(splitValueBy("-")+".first().toUpperCase() == "+attribute.value.toUpperCase().inspect());break;case"!=":conditions.push(value+" != "+attribute.value.inspect());break;case"":case undefined:conditions.push("element.hasAttribute("+attribute.name.inspect()+")");break;default:throw"Unknown operator "+attribute.operator+" in selector";}});}return conditions.join(" && ");},compileMatcher:function(){this.match=new Function("element","if (!element.tagName) return false;       element = $(element);       return "+this.buildMatchExpression());},findElements:function(scope){var element;if(element=$(this.params.id)){if(this.match(element)){if(!scope||Element.childOf(element,scope)){return[element];}}}scope=(scope||document).getElementsByTagName(this.params.tagName||"*");var results=[];for(var i=0,length=scope.length;i<length;i++){if(this.match(element=scope[i])){results.push(Element.extend(element));}}return results;},toString:function(){return this.expression;}};Object.extend(Selector,{matchElements:function(elements,expression){var selector=new Selector(expression);return elements.select(selector.match.bind(selector)).map(Element.extend);},findElement:function(elements,expression,index){if(typeof expression=="number"){index=expression,expression=false;}return Selector.matchElements(elements,expression||"*")[index||0];},findChildElements:function(element,expressions){return expressions.map(function(expression){return expression.match(/[^\s"]+(?:"[^"]*"[^\s"]+)*/g).inject([null],function(results,expr){var selector=new Selector(expr);return results.inject([],function(elements,result){return elements.concat(selector.findElements(result||element));});});}).flatten();}});function $$(){return Selector.findChildElements(document,$A(arguments));}var Form={reset:function(form){$(form).reset();return form;},serializeElements:function(elements,getHash){var data=elements.inject({},function(result,element){if(!element.disabled&&element.name){var key=element.name,value=$(element).getValue();if(value!=undefined){if(result[key]){if(result[key].constructor!=Array){result[key]=[result[key]];}result[key].push(value);}else{result[key]=value;}}}return result;});return getHash?data:Hash.toQueryString(data);}};Form.Methods={serialize:function(form,getHash){return Form.serializeElements(Form.getElements(form),getHash);},getElements:function(form){return $A($(form).getElementsByTagName("*")).inject([],function(elements,child){if(Form.Element.Serializers[child.tagName.toLowerCase()]){elements.push(Element.extend(child));}return elements;});},getInputs:function(form,typeName,name){form=$(form);var inputs=form.getElementsByTagName("input");if(!typeName&&!name){return $A(inputs).map(Element.extend);}for(var i=0,matchingInputs=[],length=inputs.length;i<length;i++){var input=inputs[i];if((typeName&&input.type!=typeName)||(name&&input.name!=name)){continue;}matchingInputs.push(Element.extend(input));}return matchingInputs;},disable:function(form){form=$(form);form.getElements().each(function(element){element.blur();element.disabled="true";});return form;},enable:function(form){form=$(form);form.getElements().each(function(element){element.disabled="";});return form;},findFirstElement:function(form){return $(form).getElements().find(function(element){return element.type!="hidden"&&!element.disabled&&["input","select","textarea"].include(element.tagName.toLowerCase());});},focusFirstElement:function(form){form=$(form);form.findFirstElement().activate();return form;}};Object.extend(Form,Form.Methods);Form.Element={focus:function(element){$(element).focus();return element;},select:function(element){$(element).select();return element;}};Form.Element.Methods={serialize:function(element){element=$(element);if(!element.disabled&&element.name){var value=element.getValue();if(value!=undefined){var pair={};pair[element.name]=value;return Hash.toQueryString(pair);}}return"";},getValue:function(element){element=$(element);var method=element.tagName.toLowerCase();return Form.Element.Serializers[method](element);},clear:function(element){$(element).value="";return element;},present:function(element){return $(element).value!="";},activate:function(element){element=$(element);element.focus();if(element.select&&(element.tagName.toLowerCase()!="input"||!["button","reset","submit"].include(element.type))){element.select();}return element;},disable:function(element){element=$(element);element.disabled=true;return element;},enable:function(element){element=$(element);element.blur();element.disabled=false;return element;}};Object.extend(Form.Element,Form.Element.Methods);var Field=Form.Element;var $F=Form.Element.getValue;Form.Element.Serializers={input:function(element){switch(element.type.toLowerCase()){case"checkbox":case"radio":return Form.Element.Serializers.inputSelector(element);default:return Form.Element.Serializers.textarea(element);}},inputSelector:function(element){return element.checked?element.value:null;},textarea:function(element){return element.value;},select:function(element){return this[element.type=="select-one"?"selectOne":"selectMany"](element);},selectOne:function(element){var index=element.selectedIndex;return index>=0?this.optionValue(element.options[index]):null;},selectMany:function(element){var values,length=element.length;if(!length){return null;}for(var i=0,values=[];i<length;i++){var opt=element.options[i];if(opt.selected){values.push(this.optionValue(opt));}}return values;},optionValue:function(opt){return Element.extend(opt).hasAttribute("value")?opt.value:opt.text;}};Abstract.TimedObserver=function(){};Abstract.TimedObserver.prototype={initialize:function(element,frequency,callback){this.frequency=frequency;this.element=$(element);this.callback=callback;this.lastValue=this.getValue();this.registerCallback();},registerCallback:function(){setInterval(this.onTimerEvent.bind(this),this.frequency*1000);},onTimerEvent:function(){var value=this.getValue();var changed=("string"==typeof this.lastValue&&"string"==typeof value?this.lastValue!=value:String(this.lastValue)!=String(value));if(changed){this.callback(this.element,value);this.lastValue=value;}}};Form.Element.Observer=Class.create();Form.Element.Observer.prototype=Object.extend(new Abstract.TimedObserver(),{getValue:function(){return Form.Element.getValue(this.element);}});Form.Observer=Class.create();Form.Observer.prototype=Object.extend(new Abstract.TimedObserver(),{getValue:function(){return Form.serialize(this.element);}});Abstract.EventObserver=function(){};Abstract.EventObserver.prototype={initialize:function(element,callback){this.element=$(element);this.callback=callback;this.lastValue=this.getValue();if(this.element.tagName.toLowerCase()=="form"){this.registerFormCallbacks();}else{this.registerCallback(this.element);}},onElementEvent:function(){var value=this.getValue();if(this.lastValue!=value){this.callback(this.element,value);this.lastValue=value;}},registerFormCallbacks:function(){Form.getElements(this.element).each(this.registerCallback.bind(this));},registerCallback:function(element){if(element.type){switch(element.type.toLowerCase()){case"checkbox":case"radio":Event.observe(element,"click",this.onElementEvent.bind(this));break;default:Event.observe(element,"change",this.onElementEvent.bind(this));break;}}}};Form.Element.EventObserver=Class.create();Form.Element.EventObserver.prototype=Object.extend(new Abstract.EventObserver(),{getValue:function(){return Form.Element.getValue(this.element);}});Form.EventObserver=Class.create();Form.EventObserver.prototype=Object.extend(new Abstract.EventObserver(),{getValue:function(){return Form.serialize(this.element);}});if(!window.Event){var Event=new Object();}Object.extend(Event,{KEY_BACKSPACE:8,KEY_TAB:9,KEY_RETURN:13,KEY_ESC:27,KEY_LEFT:37,KEY_UP:38,KEY_RIGHT:39,KEY_DOWN:40,KEY_DELETE:46,KEY_HOME:36,KEY_END:35,KEY_PAGEUP:33,KEY_PAGEDOWN:34,element:function(event){return event.target||event.srcElement;},isLeftClick:function(event){return(((event.which)&&(event.which==1))||((event.button)&&(event.button==1)));},pointerX:function(event){return event.pageX||(event.clientX+(document.documentElement.scrollLeft||document.body.scrollLeft));},pointerY:function(event){return event.pageY||(event.clientY+(document.documentElement.scrollTop||document.body.scrollTop));},stop:function(event){if(event.preventDefault){event.preventDefault();event.stopPropagation();}else{event.returnValue=false;event.cancelBubble=true;}},findElement:function(event,tagName){var element=Event.element(event);while(element.parentNode&&(!element.tagName||(element.tagName.toUpperCase()!=tagName.toUpperCase()))){element=element.parentNode;}return element;},observers:false,_observeAndCache:function(element,name,observer,useCapture){if(!this.observers){this.observers=[];}if(element.addEventListener){this.observers.push([element,name,observer,useCapture]);element.addEventListener(name,observer,useCapture);}else{if(element.attachEvent){this.observers.push([element,name,observer,useCapture]);element.attachEvent("on"+name,observer);}}},unloadCache:function(){if(!Event.observers){return;}for(var i=0,length=Event.observers.length;i<length;i++){Event.stopObserving.apply(this,Event.observers[i]);Event.observers[i][0]=null;}Event.observers=false;},observe:function(element,name,observer,useCapture){element=$(element);useCapture=useCapture||false;if(name=="keypress"&&(navigator.appVersion.match(/Konqueror|Safari|KHTML/)||element.attachEvent)){name="keydown";}Event._observeAndCache(element,name,observer,useCapture);},stopObserving:function(element,name,observer,useCapture){element=$(element);useCapture=useCapture||false;if(name=="keypress"&&(navigator.appVersion.match(/Konqueror|Safari|KHTML/)||element.detachEvent)){name="keydown";}if(element.removeEventListener){element.removeEventListener(name,observer,useCapture);}else{if(element.detachEvent){try{element.detachEvent("on"+name,observer);}catch(e){}}}}});if(navigator.appVersion.match(/\bMSIE\b/)){Event.observe(window,"unload",Event.unloadCache,false);}var Position={includeScrollOffsets:false,prepare:function(){this.deltaX=window.pageXOffset||document.documentElement.scrollLeft||document.body.scrollLeft||0;this.deltaY=window.pageYOffset||document.documentElement.scrollTop||document.body.scrollTop||0;},realOffset:function(element){var valueT=0,valueL=0;do{valueT+=element.scrollTop||0;valueL+=element.scrollLeft||0;element=element.parentNode;}while(element);return[valueL,valueT];},cumulativeOffset:function(element){var valueT=0,valueL=0;do{valueT+=element.offsetTop||0;valueL+=element.offsetLeft||0;element=element.offsetParent;}while(element);return[valueL,valueT];},positionedOffset:function(element){var valueT=0,valueL=0;do{valueT+=element.offsetTop||0;valueL+=element.offsetLeft||0;element=element.offsetParent;if(element){if(element.tagName=="BODY"){break;}var p=Element.getStyle(element,"position");if(p=="relative"||p=="absolute"){break;}}}while(element);return[valueL,valueT];},offsetParent:function(element){if(element.offsetParent){return element.offsetParent;}if(element==document.body){return element;}while((element=element.parentNode)&&element!=document.body){if(Element.getStyle(element,"position")!="static"){return element;}}return document.body;},within:function(element,x,y){if(this.includeScrollOffsets){return this.withinIncludingScrolloffsets(element,x,y);}this.xcomp=x;this.ycomp=y;this.offset=this.cumulativeOffset(element);return(y>=this.offset[1]&&y<this.offset[1]+element.offsetHeight&&x>=this.offset[0]&&x<this.offset[0]+element.offsetWidth);},withinIncludingScrolloffsets:function(element,x,y){var offsetcache=this.realOffset(element);this.xcomp=x+offsetcache[0]-this.deltaX;this.ycomp=y+offsetcache[1]-this.deltaY;this.offset=this.cumulativeOffset(element);return(this.ycomp>=this.offset[1]&&this.ycomp<this.offset[1]+element.offsetHeight&&this.xcomp>=this.offset[0]&&this.xcomp<this.offset[0]+element.offsetWidth);},overlap:function(mode,element){if(!mode){return 0;}if(mode=="vertical"){return((this.offset[1]+element.offsetHeight)-this.ycomp)/element.offsetHeight;}if(mode=="horizontal"){return((this.offset[0]+element.offsetWidth)-this.xcomp)/element.offsetWidth;}},page:function(forElement){var valueT=0,valueL=0;var element=forElement;do{valueT+=element.offsetTop||0;valueL+=element.offsetLeft||0;if(element.offsetParent==document.body){if(Element.getStyle(element,"position")=="absolute"){break;}}}while(element=element.offsetParent);element=forElement;do{if(!window.opera||element.tagName=="BODY"){valueT-=element.scrollTop||0;valueL-=element.scrollLeft||0;}}while(element=element.parentNode);return[valueL,valueT];},clone:function(source,target){var options=Object.extend({setLeft:true,setTop:true,setWidth:true,setHeight:true,offsetTop:0,offsetLeft:0},arguments[2]||{});source=$(source);var p=Position.page(source);target=$(target);var delta=[0,0];var parent=null;if(Element.getStyle(target,"position")=="absolute"){parent=Position.offsetParent(target);delta=Position.page(parent);}if(parent==document.body){delta[0]-=document.body.offsetLeft;delta[1]-=document.body.offsetTop;}if(options.setLeft){target.style.left=(p[0]-delta[0]+options.offsetLeft)+"px";}if(options.setTop){target.style.top=(p[1]-delta[1]+options.offsetTop)+"px";}if(options.setWidth){target.style.width=source.offsetWidth+"px";}if(options.setHeight){target.style.height=source.offsetHeight+"px";}},absolutize:function(element){element=$(element);if(element.style.position=="absolute"){return;}Position.prepare();var offsets=Position.positionedOffset(element);var top=offsets[1];var left=offsets[0];var width=element.clientWidth;var height=element.clientHeight;element._originalLeft=left-parseFloat(element.style.left||0);element._originalTop=top-parseFloat(element.style.top||0);element._originalWidth=element.style.width;element._originalHeight=element.style.height;element.style.position="absolute";element.style.top=top+"px";element.style.left=left+"px";element.style.width=width+"px";element.style.height=height+"px";},relativize:function(element){element=$(element);if(element.style.position=="relative"){return;}Position.prepare();element.style.position="relative";var top=parseFloat(element.style.top||0)-(element._originalTop||0);var left=parseFloat(element.style.left||0)-(element._originalLeft||0);element.style.top=top+"px";element.style.left=left+"px";element.style.height=element._originalHeight;element.style.width=element._originalWidth;}};if(/Konqueror|Safari|KHTML/.test(navigator.userAgent)){Position.cumulativeOffset=function(element){var valueT=0,valueL=0;do{valueT+=element.offsetTop||0;valueL+=element.offsetLeft||0;if(element.offsetParent==document.body){if(Element.getStyle(element,"position")=="absolute"){break;}}element=element.offsetParent;}while(element);return[valueL,valueT];};}Element.addMethods();